EnvironmentAncient DNA suggests dogs split from wolves 40,000 years ago An extinct wolf's DNA has pushed back the origin of dogs by more than 10,000 years, but when humans domesticated them is still lost in the mists of time ¿ìè¶ÌÊÓÆµ
LifeRock-forming microbes may be suited for life on other planets Some microbes live inside the limestone houses they build – a unique lifestyle that could be suited to the harsh conditions on alien worlds ¿ìè¶ÌÊÓÆµ